Collapsible chair



FIG. 1 is a front perspective view of the frame of a collapsible chair showing our new design.

FIG. 2 is a front view thereof.

FIG. 3 is a right side view thereof.

FIG. 4 is a left side view thereof.

FIG. 5 is a back view thereof; and,

FIG. 6 is a top view thereof. 

CLAIM The ornamental design for the collapsible chair, as shown and described. 